F Flammi Stretch Fit Ice & Snow Grips with Anti-Slip 10-Studs Traction Cleats Over Footwear Made of TPE rubber, stretch fit over shoes The traction spikes use the special Ground-gripping steel studs offer excellent traction on ice and snow Easy to use, fit the front of shoes, then adjust the back Slip-on traction cleats to reduce the risk of falls when walking on snow or ice to work, school Strong performs in temperatures as low as -41